package net.tensor.utils;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;

/**
 * 字符串加密解密
 */

public class DeshfuUtil {

    private static final String PASSWORD_CRYPT_KEY = "TOGETHER!@#$%";

    // 解密数据
//    public static String decrypt(String message) throws Exception {
//
//        byte[] bytesrc = convertHexString(message);
//        Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
//        DESKeySpec desKeySpec = new DESKeySpec(JavaMD5.getMD5ofStr(PASSWORD_CRYPT_KEY)
//                .substring(0, 8).getBytes("UTF-8"));
//        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
//        SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
//        IvParameterSpec iv = new IvParameterSpec(JavaMD5.getMD5ofStr(PASSWORD_CRYPT_KEY)
//                .substring(0, 8).getBytes("UTF-8"));
//        cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);
//        byte[] retByte = cipher.doFinal(bytesrc);
//        return new String(retByte);
//
//    }
//
//    public static String encrypt(String message) throws Exception {
//        Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
//        DESKeySpec desKeySpec = new DESKeySpec(JavaMD5.getMD5ofStr(PASSWORD_CRYPT_KEY)
//                .substring(0, 8).getBytes("UTF-8"));
//        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
//        SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
//        IvParameterSpec iv = new IvParameterSpec(JavaMD5.getMD5ofStr(PASSWORD_CRYPT_KEY)
//                .substring(0, 8).getBytes("UTF-8"));
//        cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);
//        return toHexString(cipher.doFinal(message.getBytes("UTF-8")));
//    }
//
//    public static byte[] convertHexString(String ss) {
//        byte digest[] = new byte[ss.length() / 2];
//        for (int i = 0; i < digest.length; i++) {
//            String byteString = ss.substring(2 * i, 2 * i + 2);
//            int byteValue = Integer.parseInt(byteString, 16);
//            digest[i] = (byte) byteValue;
//        }
//        return digest;
//    }
//
//    public static String toHexString(byte b[]) {
//        StringBuffer hexString = new StringBuffer();
//        for (int i = 0; i < b.length; i++) {
//            String plainText = Integer.toHexString(0xff & b[i]);
//            if (plainText.length() < 2) {
//                plainText = "0" + plainText;
//            }
//            hexString.append(plainText);
//        }
//        return hexString.toString();
//    }
}
